Pull users api-key: secret pairs from the config file
Create a ServiceView for authorizing requests using HMAC

Apply this to all the views here.
Added test script for making a request with curl and openssl
Updated bash test script to pass additional args
Removed authentication from views / methods the app needs to access
Stop echoing out curl (outputs both stdout and stderr)
Added docs for the auth_test helper script inline and in README
Added docs about configuring users.
Update Register views to work without authentication
Updated example http requests in docs with headers for authentication
Echo the canonical representation with newlines
Merge pull request #7 from ox-it/hmac-support

HMAC support